FileCacheFactory::get

public static FileCacheFactory::get($collection, $default_configuration = [])

public static function get($collection, $default_configuration = []) {
  // If there is a special key in the configuration, disable FileCache completely.
  if (!empty(static::$configuration[static::DISABLE_CACHE])) {
    return new NullFileCache('', '');
  }

  $configuration = [];

  // Check for a collection specific setting first.
  if (isset(static::$configuration[$collection])) {
    $configuration += static::$configuration[$collection];
  }
  // Then check if a default configuration has been provided.
  if (!empty($default_configuration)) {
    $configuration += $default_configuration;
  }
  // Last check if a default setting has been provided.
  if (isset(static::$configuration['default'])) {
    $configuration += static::$configuration['default'];
  }

  // Ensure that all properties are set.
  $fallback_configuration = [
    'class' => '\Drupal\Component\FileCache\FileCache',
    'collection' => $collection,
    'cache_backend_class' => NULL,
    'cache_backend_configuration' => [],
  ];

  $configuration = $configuration + $fallback_configuration;

  $class = $configuration['class'];
  return new $class(static::getPrefix(), $configuration['collection'], $configuration['cache_backend_class'], $configuration['cache_backend_configuration']);
}